Maynuo M8811 inside pic

[SeanB]

Yes, they have an internal spring that keeps the think locked at all times, and provides holding force to the cable end to make secure contact.

[metalphreak]

It doesn't hold very small gauge wire properly. Adding a wire ferrule crimped on the end gives it a larger size and something rigid to push into the connector.

[crt]

Yes, they have an internal spring that keeps the think locked at all times, and provides holding force to the cable end to make secure contact.

It doesn't hold very small gauge wire properly. Adding a wire ferrule crimped on the end gives it a larger size and something rigid to push into the connector.

Thank's for your information
Everything is work fine

Next, I will update/edit my post about Low Voltage / Max Current test (about 5-6 hour)

[crt]

FWIW, the power designs precision supply can output its rated current down to ~ 3mV before it rolls off, compared to your unit of ~ 292mV.

After using Sensing Wire

here last result

Setting Voltage (Max Current) ==> Voltage Reading (DMM) and Constant Current 5A
0.30V @ 5.1A ==> 0.299V @ 5.0070A
0.25V @ 5.1A ==> 0.249V @ 5.0072A
0.20V @ 5.1A ==> 0.200V @ 4.7835A
0.15V @ 5.1A ==> 0.149V @ 3.5871A
0.10V @ 5.1A ==> 0.100V @ 2.3916A
0.05V @ 5.1A ==> 0.049V @ 1.1765A

Current start to drop below 5.0A @ 0.211V
At 0.002V setting ==> reading 0.001V at DMM @ 0.0209A
Current start to ZERO when setting at 0.001V ==> reading 0.000V at DMM

[crt]

You should program the PSU for 10V/5A and the eload to 10V 5A, then 10V .05A alternating say at 1 sec intervals, and check if the PSU actually produces that output and the response waveforms; this can be very stressful on PSU and can damage them if you do this for long periods.  That load will simulate radio transmission [ or cellphones if you set it to 3.5V instead] alternating between send and quiescent.

I had try dynamic load as you suggest
DS load (CC) 5A@1s // 0.05A@1s
PSU 10V@5A, but when turn it on, Voltage drop to 0.234V
so i increase current to 5.05A


anyway, how to set PSU for Constant Voltage ?

Switch-on performance with 5A load (5.010A @ PSU)


Switch-on performance with 5A load (5.015A @ PSU)


Switch-on performance with 5A load (5.020A @ PSU)


Switch-on performance with 5A load (5.025A @ PSU)


Switch-on performance with 5A load (5.030A @ PSU)


Switch-on performance with 5A load (5.040A @ PSU)

[saturation]

@ crt, these look very good, no spikes.  Not like this PSU:

https://www.eevblog.com/forum/reviews/beware-yihua-yh-305d-bench-psu/30/

[crt]

I just realize when viewing Dave review about atten psu, and some other psu
This M8811 looks like do not have multitaps output at transformer
I heard relays clicks only when switch form local to remote sense and vice versa ?

[metalphreak]

Looking at the transformer, the only decent output rail with sufficient current is the 40V 7.1A one. I wonder what sort of topology they are using? It's meant to be a linear supply right?

Do you have an AC power meter? Would be interesting to see the power draw when its only putting out a low voltage/high current.

[crt]

Looking at the transformer, the only decent output rail with sufficient current is the 40V 7.1A one. I wonder what sort of topology they are using? It's meant to be a linear supply right?

Do you have an AC power meter? Would be interesting to see the power draw when its only putting out a low voltage/high current.

Yes, agreed with you.
I just read manual, i found M8811 is Programmable DC Power Supply (don't know this is linear or not), only M8831 that says Programmable Linear Power Supply

unfortunately i dont have AC Power meter 

Extra pic
5-0-10-0-15-0-20-0-25-0-30-0 Volt Sequence (@50ms) without load


5-0-10-0-15-0-20-0-25-0-30-0 Volt Sequence (@50ms) with 5A load